If you're looking to install NCH Switch Audio File Converter Plus 11.1.5 on your system, you can download the full install version from the official website. Note that the software requires a valid license key to activate all features.
Are you trying to for an older version, or15? Switch Audio File Converter Software
Obtain the switchsetup.exe (Windows) or switchmac.zip (macOS) from the official NCH Software website or verified distributors like FileHippo .